Water-tube boiler.



M. W. SEWALL, D. s. JAOO'BUS & G. E. PALMER. WATER TUBB'YBOILER.

APPLICATION FILED IEB.20,1909. I LQ94WME Patented 41128, 1914.

5 SHEETS-$31131 l.

WITNESSES INVEHTUfi' A TTOIINEYS M. W. SEWALL, D. S. JAGOBUS & G. E. PALMER. VVATER TUBE BOILER.

APPLICATION 1 11.21) PEB. 20, 1909.

1,9%, ?54.. I Patented Apr.28,1914-.

5 SHEETS-SHEET 2.

WVTNESSES M MN T085 dw lf Ff. CM (W1 4,", 614

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M. W. SBWALL, D. S. JAGOBUS & G, E. PALMER.

' WATER TUBE BOILER.

APPLICATION FILED FEBZO, 1909. V

Patented M1228, 1914.

5 SHEETS-SHEET 3.

WITNESSES A TTGHNEYS M. W. SEWALL, D. S. JAOOBUS & G. E. PALMER.

' WATER TUBE BOILER.

APPLICATION FILED FEB. 20, 1909 ggg Patented Ap1x28, 1914;. I

5 SHEETS'SHEET 4.

A TTORIJEYS M. W. SEWALL, D. S. JAGOBUS & G. E. PALMER.

WATER TUBE BOILER.

APPLICATION TILED FEB.20, 1909.

5 SHEETS-SHEET 5.

g1, Tan

DAVID 13F CHICAGCI.

1., NEE" JEEISEY A CORPORATIGN OF NEW CITY, NE?! ASSIGI OBS TO THE BAB- Specification of Letters Patent. Pggfbggflggd A 25;, 15,1151 .ilppltea'i'ion Serial No. 479,218.

ey, and United ion 11 and .z'ieii' eonout of oemhei' up 1111111 tins i} c 'wcabie to r1111 51 1 ininous eon moo? iction of a. smoky n nice. e present invention .12: to so boiler semi-motion proper above ieierreo to as to maintain the efiioieney and also the siez in neralmg ability for which cl and at the some tune to enable it iii v0 t-iio bituminous coal withan uiarly when com- :1 sugerheater and on automatic 11011 as chain grate.

:3, oi? 1 1g. ii. 1 1 111 L10 lim-v 4. i 01' t View.

1 sic-am and wnier-drun 11111; :13 1011;; 115111111 but which 111:1 be :15 511011111 111 said Patent Ho oi mfies into 'lG {hi-e1 transverse passes A,

1s 11 superhe i131 located in fee triangular steam drum and the passes he have to heat this 1 in go 01131 the deflector 6.

J is ti furnace containing the rails 10, 11, 11 3011 1: )i(i1 111115 the chain ite apparatus 'eli known oonst311etio11 chain g1 ate apparatus is sin \1'11 in -11 in Fig. 2 and the position of the 011 1 dotted lines in Fig. 1, but the 011' the furnace with the chain rains removed.

a i'UtbliCk 111-011 00111;? we above the grade 1111 length of the g1 at the rum of: he gm 1,1; 0211- W ieaiing upward to the ding ienrwznrdly and upwe. w pass i' 5.111 the bank of 1: arch l at face 0 if; :1 bridge the rear 2'1 1 1e 1: is placed it a proper disuanee above ifie at about the izingent 10411; 0 2 58 ,ui've of the grate it pe ses over its be. 1 epz'oekei Wheel. box. 16 forms Lt den against which the 1/ c211 ied by ihe movement 01 the grate and under which the elinkel and ash pass to be Gisehm'g {Efrem the The W 11i 15 covers the top of the box 16 i1) prevenfi i100 rapid development if 'tezzm from th m of the box Wiih poeibie steam pocketing which might result in overheating 1111i Hing. The box 15 is supplied-With circa lating Water by a bent tube 17 which is ex panded a; one end into a lower tube hole of the down-take header. The other end is OK- panded into the top of the Water-box 16. An outlet tube shown in dotted lines at 18, Fig. 2, is taken from the top of the waten box 16 at its opposite end and leads to a lower tube, hole in the tip-take header.

Above the box 16, We prefer to continue the overhang of the Wall 15, as shown in Fig. 1 at 19. Thereby, the heat upon the surfaces 20 and 21 bounding the passage W is so intense that any noncombustible material depositing upon those surfaces Which would otherwise i oi'in clinker is melted and diips down onto the tire and is carried by the grate into the ash-pit. Above the arch it is a secondary arch 22 adapted to stand in case the lower arch 14. should fall. This is particularly important in case the inner end of the lower arch should fall at a time when the boiler cannot Well he put out of commission. The cross wall above the i4!) secondary arch connects ill with the battle 2? and forms a chan'iber into ivhich shot may fall and collectand be removed through a door in the brick settiiw. A floor 25 is constructed within this soot chamber from and firebrick to form a ventilating space, keeping cool the cross rods extending" thtrcthrough for the proper maintenance of the skew back ofthe arches. The ballle 2'? is of fircbrick and constitutes a roof embracing the lower row oi? the bank of Water-tubes and extending from the cross Wall 23 to the footof the battle 6. This is built of firebrick of special shape supported. by the boiler tubes and forming a root or diaphragm between the passage V and the secand pass i in the bank-v of Water-tubes.

A door 28.1301 observation and for access t) the fire is placed in the side Wall of the furnace at the mouth of the throat V. 29 is at opening for the cleaning of the space 30 between the fircbrick wall 15 and the firebrick Wall 31, extending from the up-take header Qto the floor line.

'lue iirebrick arches i l and 22 are sup porttd at opposite ends by skew backs, one of Wl'ich is shown at 32 in Fig. 4. They rest on do lower fianges of. i.-beams 33, 34, placed directly in contact with double heam buck stays shown in dotted lines in Fig. l. The skew backs 32 are suliiciently removed from the fire so that they are not detrinientally affected by the heat of the furnace; 18 inches of firebrick Work intervening, between the nearest point of the skew back and the inside of the furnace side Wall. At the bottom, the buck-stays rest on beams 36 and each pair of buck-stays is socured together at the top by a tie-rod 37 extendi'ngjaeross above the arch. Those tici-ods otter the inner and therefore hotter part 05 the furnace are protected from the neonate walls of a battery of furnaces and independent sets oi? buck-stays are used for the iudi'vidiuil furnaces of the battery. hereiore, each furnace is s lf-sustaining and may be repaired independently oi' the other 'tfurnaccs (if the battery.

By the construction shown and above described, an exceedingly strong and readily repaired furnace is made and the parts ontering into this construction. which would be injured by heat are Well 3rotected against such injury and the inner portion. oi the arch '14, which being subjected to the high est temperature is the first to chip oil and crun'ible away, is supplemented by the overlyiil a; arch 22. The secondary arch may be extended completely oner the main arch to serve in case the Whole main arch should fail.

A. trough consistint oi a channel beam 39 with the ends closed is placed under each header to catch any Wash Water that may overflow when cleaning the boilers and to convey it away rather than/allow it to fall on the lire-brick WOlk below and injure the arches or Walls.

Instead of being formed Within a iurnace having overlying and flanking steam generating Water-tubes intended for llthQXblttO- tion of heat and thence proceeding directly upward into the first transverse pass of the bank of tubes in said Home Patent No. 638,716, the volatile gases in our construction are generated in firebrick wall surroundings and before reaching the first transverse pass are compelled to traverse the passages JV and V still substantially surrounded by firebrick Walls. Thus, where volatile bituminous coal is employed, the flame of the gases should terminate in the passage V before reaching the first transverse pass A. in the bank of tubes and will be surrounded by such non-cooling conditions that it will terminate in a clear flame as distinguished from smoky flame and thus avoid the smoke nuisance. At the same time their temperature upon entering the transverse pass will be such as to maintain that degree of evaporation and that eiiiciency for which the said boiler construction is noted.

The principle of operation oi our furnace may be applied to other kinds of water-tube boilers than that shown and, therefore, un less the lii'nitation is expressed in the claims. We do not Wish to be understood as limited There is a pocket 39 between the adjacent a,

Kind of Water-tube boiler. This or" furnace operation is embodied co nbinetion of three distinct parts,

7 {l Thetuei chamber Xwherein the ord is gssiiied and the fixed carbon burned sence of the highiy heated recc of the arch 1%. The inber W wherein the volatiiized v thoroughiy mixed with air in 1Q through or at the Leer of the gr te rein the mixture is under the diuence of the radiant heat radiating; through chamber W our portion of 1Y8 cords of the r 3} final combustion chamber i 1. n the combustion 15 completed and the ii; no ends substsntialiy before it reaches tubes ror the generation of srec The iiubie or total heat of the gases incr uses combustion of the volatiiized gases inucs in the passages W V; not being by eny Substantial. contact of e with tubes for the generation of in those passages; and being, in the go 35, directly in the fuii force of the at rndizit' from the portion of the grate below the seine. This increase in the available or total heat the gusescunnot be 'Hii'lillQii by a m/ronieter because of the hect oi? the. radiant heat on the same in chamber l and passage JV ses roletihzcd in the fuel chamber under arch turn, first into the chainthence turn into the chamber V, and turn the first pass among the These turns in the course of important because each turn the and produce more or in their flow so to shorten the fiance and insure their proper sniokeiess combustion before reaching the Writer tubes.

Having thus described our invention, We claim as neW-- 1. In e Water tube boiier, in combination, a furnace having side walls, en arched, roof spanning the furnace shore the grate, a cross wall above the arch, e root extending from said cross Well and. forming with the cross wail a chamber into which soot may tell, a floor for said chamber above the arch and forming with the arch a space excluded from the furnace, buck stays forming ebut- HEIRS for the opposite ends of the arch, and tie rods connecting the buck stays through said space.

2. in a Water tube boiler, in combination, a furnace comprising side Walls and an arched roof spanning the furnace above the grate, buck stays forming an abutment for said arch, tie rods connecting the buck stays on opposite sides and extending between said arch and the bank or" tubes, and e floor 25 interposed between the bank of tubes and the tie rods and providing an air space exterior to the furnace for said tie rods above the arch.

In testimony whereof: we have names to this specification in presence of two subscribing Witnesses.

EHNOTT VJ, SEWALL.

DAVID S. JACOBUS.

Witnesses to Sewali and Jucobus:

Eni'rH CAMP,

S. Des ns,

Witnesses to Eshner:

Ermine Annsnson, CHAR-Les ERAKE. 

